The vibration of the centrifugal slurry pump varies with flow rate, typically being at its lowest near the efficiency point flow rate and increasing as the flow rate increases or decreases. Starting from the optimal efficiency point flow rate, the vibration change with flow rate depends on the pump's energy density, specific speed, and cavitation specific speed. Generally, the vibration change amount increases with the increase in energy density, specific speed, and cavitation specific speed.

Centrifugal slurry pumps, in addition to the *minimum continuous flow indicated on the performance curve, also feature a *minimum continuous heat flow. When operating at low flow conditions, some of the liquid's energy is converted into heat, raising the temperature of the liquid at the inlet. When the liquid temperature causes the effective NPSH (Net Positive Suction Head) to equal or fall below the pump's required NPSH, cavitation occurs.

Under normal flow conditions, the automatic balancing disc of the slurry pump itself can effectively balance the axial force of the rotor. However, when the flow rate is too low, due to the increased axial force, the automatic balancing disc is unable to balance the axial force of the rotor, resulting in an axial force acting on the rotor towards the impeller inlet, causing the rotor to move forward and leading to severe wear on the rotor, balancing disc, and other components.